IB/uverbs: Allow resize CQ operation to return driver-specific data

Add a ib_uverbs_resize_cq_resp.driver_data field so that low-level drivers can return data from a resize CQ operation to userspace. Have ib_uverbs_resize_cq() only copy the cqe field, to avoid having to bump the userspace ABI. Signed-off-by: Ralph Campbell <[email protected]> Signed-off-by: Roland Dreier <[email protected]>
mgowda · Sep 22, 2006 · 64f817b · 64f817b
1 parent fab9722
commit 64f817b
Show file tree

Hide file tree

Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
@@ -879,11 +879,10 @@ ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 	if (ret)
 		goto out;
 
-	memset(&resp, 0, sizeof resp);
 	resp.cqe = cq->cqe;
 
 	if (copy_to_user((void __user *) (unsigned long) cmd.response,
-			 &resp, sizeof resp))
+			 &resp, sizeof resp.cqe))
 		ret = -EFAULT;
 
 out:

diff --git a/include/rdma/ib_user_verbs.h b/include/rdma/ib_user_verbs.h
@@ -275,6 +275,8 @@ struct ib_uverbs_resize_cq {
 
 struct ib_uverbs_resize_cq_resp {
 	__u32 cqe;
+	__u32 reserved;
+	__u64 driver_data[0];
 };
 
 struct ib_uverbs_poll_cq {